All will be Well down west if Taffs can win the big promotion battle.
The Wellmen are second, three points behind leaders Monmouth Town, and one point ahead of County.
Monmouth, who are at Caerau Ely tomorrow (Saturday), are in pole position, but Haverfordwest remain intent on earning promotion and must finish in the Division One top two to achieve that.
County must win their Bank Holiday clash with Taffs Well, who have maintained a strong challenge at the top of Welsh League football over the last few seasons.
Haverfordwest won 3-2 at Goytre United this week to step up their challenge, a result which left Prestatyn, Port Talbot and Connah's Quay peering nervously over their shoulders.
If Haverfordwest regain their place in the top flight of Welsh football then one of those three will be relegated along with Afan Lido.
Aberdare Town are at home against Goytre FC tomorrow, while AFC Porth entertain Tata Steel and Penybont FC travel to play Aberbargoed Buds.
Pontardawe Town take on Cambrian and Clydach at home.
There are only two Bank Holiday fixtures in the top three Welsh League divisions and they are Haverfordwest v Taffs Well and the Division Three clash featuring Cwmamman United and Llantwit Major (2.30pm).
Next Tuesday the First Division fixtures are Caerau (Ely) v Tata Steel and Pontardawe Town v Cwmbran Celtic, while Aberbargoed Buds entertain West End on Wednesday.